Download Tonnage Load Module User`s Manual

ZT-4
Tonnage Load Module
By Toledo Integrated Systems
User’s Manual
17618
ZT-4
Load Module
User’s Manual
Revision: A
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ZT-4 User’s Manual
Table of Contents
Limited Warranty .............................................................................................................................. 4 Features Overview ........................................................................................................................... 5 Specifications ................................................................................................................................... 7 Installation ........................................................................................................................................ 9 Mounting the ZT-4 ........................................................................................................................ 9 DC Power Connection ................................................................................................................ 10 Shunt Resistors .......................................................................................................................... 11 Tonnage Gage Sensor Connection ............................................................................................ 12 20mA-out Sensor Connection..................................................................................................... 16 10V-out Sensor Connection........................................................................................................ 18 Analog Voltage Output................................................................................................................ 20 Analog Current Output ................................................................................................................ 21 Triggering – Internal Threshold................................................................................................... 22 Triggering – External Probe ........................................................................................................ 23 Calibration ...................................................................................................................................... 25 Front Panel Controls ................................................................................................................... 25 Notes – Bar-Graph Voltmeter ..................................................................................................... 25 Calibration Procedures ............................................................................................................... 26 Check Calibration ....................................................................................................................... 31 Operation ........................................................................................................................................ 33 Peak Mode Operation ................................................................................................................. 33 Track Mode Operation ................................................................................................................ 34 Appendix ......................................................................................................................................... 37 A) Sensor Installation (Doc# 11080) .................................................................................... 37 B) Calibration Sheets (2) (Form# 1224) ............................................................................... 37 Table of Figures
Figure 1: Mounting Dimensions ..................................................................................................... 9 Figure 2: DC Power Wiring .......................................................................................................... 10 Figure 3: Channel 1 Built-In 1M Ohm Shunt Resistor Wiring ...................................................... 11 Figure 4: Channel 1 External Shunt Resistor Installation ............................................................ 11 Figure 5: Strain Gage Sensor Input ............................................................................................. 13 Figure 6: Strain Gage Sensor Cable Stripping ............................................................................ 14 Figure 7: Strain Gage Sensor Wiring ........................................................................................... 15 Figure 8: 20mA-out Sensor Input ................................................................................................. 17 Figure 9: 10V-out Sensor Input .................................................................................................... 19 Figure 10: Analog Voltage Output Wiring ................................................................................... 20 Figure 11: Analog Current Output Wiring ................................................................................... 21 Figure 12: Internal Threshold Wiring .......................................................................................... 22 Figure 13: Probe Input Wiring .................................................................................................... 23 Figure 14: Probe Timing Diagram .............................................................................................. 24 Figure 15: Calibration Gain Voltage Measurement .................................................................... 29 Figure 16: Calibration Card Sample ........................................................................................... 30 DOC #17495
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ZT-4 User’s Manual
Limited Warranty
This unit is warranted by the manufacturer, Toledo Transducers, Inc., to be
free of defects in workmanship and materials for one year from date of
manufacturer’s shipment. This warranty is limited to repairing or replacing
products which manufacturer’s investigation shows were defective at the
time of shipment by the manufacturer.
All products subject to this warranty must be returned for examination, repair
or replacement
F.O.B. to:
Toledo Transducers, Inc.
6834 Spring Valley Drive
Holland, Ohio 43528
The express warranty set forth herein is in lieu of all other warranties,
expressed or implied, including without limitation any warranties of
merchant-ability or fitness for a particular purpose. All such warranties
are hereby disclaimed and excluded by the manufacturer.
Repair or replacement of defective products as provided above is the sole
and exclusive remedy provided thereunder. The manufacturer shall not be
liable for any further loss, damages, or expenses, including incidental or
consequential damages, directly or indirectly arising from the sale or use of
this product.
Any unauthorized repair voids this warranty.
There are no warranties that extend beyond those expressly set forth herein.
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Features Overview

Designed to work with strain gage sensors and load cells. The ZT-4 can also accept
input from 4-20mA current output sensors or voltage output sensors.

Four independent channels for accommodating up to eight sensors.

Simultaneously provides normal peak, reverse peak, and track voltage outputs.
Channel 1 provides the associated 0-20mA current outputs.

Built-in threshold trigger simplifies installation. External probe trigger can also be used
when situation required.

LED bar-graph voltmeter for easy setup and diagnostic.

Built-in 1 Mega Ohm calibration shunt resistor. Channel 1 accepts user selected
external shunt resistor.

x1 and x10 amplifier gain ranges to work with either strong or weak signal from the
load sensor.

Auto-Zero can be selected using dip switches to compensate for zeroing errors caused
by environmental changes such as temperature, humidity, and etc.

Electrical noise rejection filter can be enabled when situation required.

Plug-in connectors for easy wiring and installation.

Standard DIN Rail mount simplifies systems integration.

Modular with common bus design allows future upgrade and expansion.
The ZT-4 tonnage load module is designed for critical force measurement applications
where accuracy, extreme stability, and dependable noise rejection is essential. It is
equipped with an LED bar-graph voltmeter for easy setup and diagnostic. The ZT-4 is
DIN rail mountable and is designed to interface with a PLC analog card and to display
output through a human machine interface (HMI).
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Specifications
Channels
One to four channels
Transducers
Full bridge, 120 to 1000 ohms.
Maximum of (2) 350 ohm sensors, paralleled per channel.
Sensor Excitation
Built in +10VDC at 250mA max.
Balance Range
+/- 1mV/V of sensor imbalance
Gain Ranges
Low range = x50 to x550 adjustable
High range = x500 to x5,500 adjustable
Calibration Shunt
Built-in 1 mega ohm (.1%). Channel 1 accepts custom shunt.
Output Range
Normal Peak and Reverse Peak = 0 to 10VDC
Track output = -10 to +10VDC
Channel 1 also provides current outputs:
Normal Peak and Reverse Peak = 0 to 20mA
Track output = -20 to +20mA
Circuit Inaccuracy
+/- .1% of full scale max.
Circuit Non-linearity
+/- .02% of full scale max.
Auto Zero
Time constant = 10 seconds. DIP switch selectable.
Frequency Response
DC to 5,000 Hz
Speed Limit
2000 SPM max. when triggered by External Probe
500 SPM max. when triggered by Internal Threshold
Operating Temperature
-4 to 158 degree F, or -20 to 70 degree C
Display
LED bar-graph voltmeter for setup and diagnostic
Trigger
Internal Threshold (.35V / .70V) base on Channel 1 signal, or
External Probe.
Probe Input
NPN/PNP proximity probes, solid state or dry contact relays.
Built-in 24VDC at 80mA max. supplies power to the probe.
Input Power
24VDC at 0.5A max. Automatic resettable fuse.
Dimensions
1.9” W x 4.1” H x 4.7” D
Mounting
Standard DIN Rail mount
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ZT-4 User’s Manual – Installation

Installation
Mounting the ZT-4
The ZT-4 is designed to clip onto standard top hat DIN rail (TH 35-7.5 or TH 35-15).
Figure 1:
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Mounting Dimensions
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ZT-4 User’s Manual – Installation
DC Power Connection
24VDC power is connected to the ZT-4 as shown in Figure 2.
Figure 2:
DC Power Wiring
Notes:
1) The 24VDC source can be in range from 18VDC to 32VDC.
2) It is important to connect an Earth Ground to the GND terminal.
3) Do not apply power until all the wirings in this Installation Section are done.
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Shunt Resistors
Each channel comes with an 1M ohm built-in shunt resistor. Channel 1 is capable of
utilizing either the 1M ohm built-in shunt resistor or a user-specified external shunt
resistor.
OR
Figure 3:
Channel 1 Built-In 1M Ohm
Shunt Resistor Wiring
Figure 4:
Channel 1 External Shunt
Resistor Installation
Shunt resistor only works directly with the Wheatstone bridge type sensor. It has no effect
if other type of sensor is used.
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Strain Gage Sensor Connection
Refer to Figure 5 for the procedures below:
Connection:
1) Prepare the sensor cable for termination as described in Illustration A on page 14.
2) Remove the Phoenix plug from its socket on the top of the unit (CH1-3) or from the
bottom of the unit (CH4) and wire the sensor cable as described in Illustration B on
page 15.
3) The Phoenix plug can then be inserted back into its socket.
Configuration:
1) Set the V / C dip-switch for the corresponding channel to “V” position for voltage
sensor. Strain Gage sensor outputs voltage signal.
2) Set the Lg / Sm dip-switch for the corresponding channel to “Sm” position for small
signal. Strain Gage sensor outputs un-amplified signal (small signal).
3) Set FIL dip-switch for the corresponding channel to “No filter” position. Apply this filter
only when electrical noise becomes a problem at the analog output.
Note: There are four sets of Sensor Signal Configuration dip-switches. Each set is for the
corresponding channel.
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Figure 5:
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Strain Gage Sensor Input
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Illustration A - Sensor Cable Termination
1) Strip the sensor cable as shown in Figure 6 below. Be sure not to knick any of the
signal conductors or cut the braid shield.
Figure 6:
Strain Gage Sensor Cable Stripping
2) Strip approximately ¼" of insulation from each of the four signal conductors.
Note: If your sensor cable is not double shielded with both foil and a braid, electrical
noise may affect your output readings.
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Illustration B - Sensors Connection
The ZT-4 accepts the signals from Toledo Transducers T-400 sensors as well as other
strain gage sensors. Figure 7 illustrates the sensor connections.
T400 Sensor
T400 Sensor
Tension Force
Compression Force
Tension connection
shown. For compression
connections, switch the
red and white wires
Figure 7:
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Strain Gage Sensor Wiring
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20mA-out Sensor Connection
The 20mA-out Sensor applies to sensors with output up to +/-20mA including the 4-20mA
output sensor. Refer to Figure 8 for the procedures below:
Connection:
1) Remove the Phoenix plug from its socket on the top of the unit (CH1-3) or from the
bottom of the unit (CH4) and wire the sensor cable as shown.
2) The Phoenix plug can then be inserted back into its socket.
Configuration:
1) Set the V / C dip-switch for the corresponding channel to “C” position for current output
sensor. 20mA-out sensor outputs current signal.
2) Set the Lg / Sm dip-switch for the corresponding channel to “Lg” position for large
signal. 20mA-out sensor outputs amplified signal (large signal).
3) Set FIL dip-switch for the corresponding channel to “No filter” position. Apply this filter
only when electrical noise becomes a problem at the analog output.
Note: There are four sets of Sensor Signal Configuration dip-switches. Each set is for the
corresponding channel.
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Figure 8:
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20mA-out Sensor Input
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ZT-4 User’s Manual – Installation
10V-out Sensor Connection
The 10V-out Sensor applies to sensors with output up to +/-10V. Refer to Figure 9 for the
procedures below:
Connection:
1) Remove the Phoenix plug from its socket on the top of the unit (CH1-3) or from the
bottom of the unit (CH4) and wire the sensor cable as shown.
2) The Phoenix plug can then be inserted back into its socket.
Configuration:
1) Set the V / C dip-switch for the corresponding channel to “V” position for voltage
sensor. 10V-out sensor outputs voltage signal.
2) Set the Lg / Sm dip-switch for the corresponding channel to “Lg” position for large
signal. 10V-out sensor outputs amplified signal (large signal).
3) Set FIL dip-switch for the corresponding channel to “No filter” position. Apply this filter
only when electrical noise becomes a problem at the analog output.
Note: There are four sets of Sensor Signal Configuration dip-switches. Each set is for the
corresponding channel.
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Figure 9:
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10V-out Sensor Input
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Analog Voltage Output
The analog voltage output is provided on a Phoenix connector for easy access and for
interfacing with other peripherals.
Analog Voltage Output:
Swing between ± 10VDC
OUT0
= Normal Output
(Average/Total Channel)
OUT1-4 = Normal Output
(Channel 1 to 4)
REV1-4 = Reverse Output
(Channel 1 to 4)
TRK1-4 = Track Output
(Channel 1 to 4)
COM
Figure 10:
= Analog Common
Analog Voltage Output Wiring
Output details:

OUT terminals output either Peak tonnage or Track tonnage, depending on the
TRK/PEAK switch setting on the front panel.

REV terminals output the reverse peak (snap-through) tonnage when the front panel
TRK/PEAK switch is set to PEAK.

TRK terminals always output the track tonnage, regardless of the front panel
TRK/PEAK switch.
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Analog Current Output
The analog current output is available in Channel 1 only. It is provided on a Phoenix
connector for easy access and for interfacing with other peripherals.
Analog Current Output
(Channel 1 only):
Swing between ± 20mA
OUT_C1 = Normal Output
REV_C1 = Reverse Output
TRK_C1 = Track Output
COM
Figure 11:
= Analog Common
Analog Current Output Wiring
Output details:

OUT_C1 terminal outputs either Peak tonnage or Track tonnage, depending on the
TRK/PEAK switch setting on the front panel.

REV_C1 terminal outputs the reverse peak (snap-through) tonnage when the front
panel TRK/PEAK switch is set to PEAK.

TRK_C1 terminal always outputs the track tonnage, regardless of the front panel
TRK/PEAK switch.
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Triggering – Internal Threshold
The ZT-4 can be triggered by an internal threshold value. When this triggering method is
used, the ZT-4 begins monitoring when the Channel 1 load rises above the level
determined by the front panel’s Th.H / L switch. Refer to Figure 12 below to configure the
unit for threshold triggering.
Figure 12:
Internal Threshold Wiring
The probe (PRB) indicators should turn on when the Channel 1 load rises above the
threshold value, and turn off when the load falls back below the threshold value.
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Triggering – External Probe
The ZT-4 can be triggered by an external probe signal. If an external probe is used, the
probe supply voltage (+24VDC) is provided by the ZT-4. The figure below illustrates the
wiring for a variety of sensing devices.
Figure 13:
Probe Input Wiring
The probe (PRB) indicators should turn on when the probe turns on, and turn off when the
probe turns off.
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If the front panel Auto-Zero switch is enabled, the ZT-4 will remain in the auto-zeroing
mode of operation until an external probe is applied.
The auto zero feature is important for accurate readings. Over time the press frame will
slightly change in its structure. This may be due to temperature or press frame tension.
The ZT-4 will compensate for the slight change. It will readjust the zero base line. This
zero base line is the no-load value of the press. With a consistent zero value, the tonnage
output readings should remain accurate.
When the probe turns on, the ZT-4 opens the window to read a load signal. In peak mode
the load level rises to the highest value.
When the probe turns off, the peak level is held at its high level and the auto-zeroing
function is resumed (Notice the dotted line below). The peak level is reset the next time
the probe transitions from off to on.
The timing of the probe should be such that it turns on just before the machine begins
generating a load (140) and remains on until the load is removed (240).
Peak Reset
Load
Signal
Probe Closed
Trigger140°
Probe
240°
140°
240°
Probe Open
ZT-4 Auto Zeroing
Figure 14:
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Probe Timing Diagram
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ZT-4 User’s Manual – Calibration

Calibration
Front Panel Controls
Refer to the diagram below for control locations.
Notes - Bar-Graph Voltmeter
Normally, a digital voltmeter is used to check the sensor balance, and output voltage
during a calibration. The digital voltmeter is connected to the OUTx and COM terminals
(see Figure 15).
If calibration accuracy of +/-1% of capacity is acceptable, the built-in Bar-graph voltmeter
can be used for calibration.
Let us use the +6.0 VOLT LED in the built-in Bar-graph voltmeter as an example here.
When this LED is on, it could mean a voltage anywhere from +6.00 volt to +6.99 volt. But
when this LED just changes state from off to on, it indicates an accurate reading of +6.00
volt. This characteristic is useful when you dial the gain pot to adjust the output voltage.
This characteristic applies to all LED’s in this Bar-graph voltmeter.
In case you need to set the output voltage to +5.50 volt, the Bar-graph voltmeter will not
work accurately. You will need to use a digital voltmeter for cases like this.
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ZT-4 User’s Manual – Calibration
Calibration Procedures
1) Before calibrating the unit, verify each hardware mentioned in the Installation Section
is connected and set up properly.
2) With the sensors placed in the best possible location, (see appendix A), torque the
sensors down to 150 in-lbs on the sensor bolts. Do not put the sensor enclosure
covers on yet. You will need to test each sensor location.
3) Find the shut height of the press.

Jog the press until the ram is at bottom dead center (BDC) or 180º without the load
cells or die in the press.

Determine the amount of spacers needed with your load cell. Cycle the press
without load cells to insure correct height.
4) Place the load cells in the correct position in the press.

All load cells should be equal distance from the sides and front and rear. For
example, 12” from the sides, 10” from front and rear. Load cells are typically
placed at each corner of the press’s bed.

Cycle the press without hitting the load cells first.

Place cardboard on the top and bottom of the load cells.
5) Toggle the Mode switches to AZ OFF, PRB OFF, TRACK, ZERO. Also, set all Gain
switches to X10 to start.
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6) Balance the tonnage sensors.

Set the Display channel selector to 1 for Channel 1. The Bar-graph voltmeter now
shows the balance of Channel 1.

Adjust the Channel 1 ZERO pot until the bar-graph has only the 2 yellow 0.0V
LEDs lit. This indicates a balanced or zeroed state (see notes on page 25).

Repeat this step for Channels 2, 3, and 4.
7) Cycle the press.

Set the Mode switches to AZ OFF, PRB, PEAK, and ZERO.

Further adjust the shut height so that the press impacts the load cells and
generates a load at 100% of press capacity. See warning below.
WARNING
Depending on the press capacity and the size of the load cells
being used, loading the press at capacity with load cells could
indent the ram or bolster. If this is a concern, you may choose
to calibrate the press only up to 80% of capacity.
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8) Adjust the gain.

Set the Display channel selector to 1 for Channel 1.

Run the press for 2 cycles at capacity.

Compare the voltage level on the bar-graph with the load cell that corresponds to
Channel 1.

Adjust the Channel 1 GAIN pot.

Repeat until the desired voltage LED just turns on (see notes on page 25).
For example, +6.0V at 100.0 tons.

If less gain is needed, change the Channel 1 Gain switch to X1, then repeat from
Step 4 for this channel only.

Repeat this step for Channels 2, 3, and 4.
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ZT-4 User’s Manual – Calibration
9) Record the Calibration Gain Voltage.

Set the Mode switches to AZ OFF, PRB OFF, TRACK, and ZERO as shown. Use
the Display channel selector, and the Bar-graph voltmeter to verify that each
sensor is at zero (see notes on page 25).

Set the ZRO/GAIN switch to GAIN and use a digital voltmeter to measure the
voltage across the OUT1 and COM terminals. Record this value as the Calibration
gain voltage for Channel 1. Then do the same for Channel 2, 3 and 4.
Figure 15:
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Calibration Gain Voltage Measurement
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ZT-4 User’s Manual – Calibration
10) Documentation.
 Fill in the Calibration Card (a sample shown below) which is located in the side
pocket.
 Set Mode switches as shown. Calibration is now complete.
Figure 16:
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Calibration Card Sample
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ZT-4 User’s Manual – Calibration
Check Calibration
Occasionally, you may need to check the unit's accuracy by verifying the Calibration gain
voltage. The Calibration gain voltage is recorded in the calibration card which is located in
the side pocket.
To verify the Calibration gain voltage, follow step 9 (page 29) in the Calibration
Procedures.
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ZT-4 User’s Manual – Operation

Operation
Once the ZT-4 has been calibrated, it is ready for continuous use. This section details the
setup for Peak Mode and Track Mode operations.
Peak Mode Operation
In Peak mode, the output will increase to the highest load level and remain at that voltage
until the probe transitions from off to on again.
1) Set the Mode switches to AZ OFF, PRB OFF, TRK, and ZRO as shown above.
2) Skip this step if Auto-Zero is not needed.
a) Toggle the OFF/AZ switch to AZ to start Auto-Zero.
b) When Auto-Zero is done, only the 2 yellow LEDs at 0.0V are lit.
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3) Set the OFF/PRB switch to PRB and set the TRK/PEAK switch to PEAK. The unit is
now ready to run in Peak mode.
Track Mode Operation
In Track mode, output will follow the loading on the sensors as the load on the machine
increases and decreases.
1) Set the Mode switches to AZ OFF, PRB OFF, TRK, and ZRO as shown above.
If Auto-Zero is not needed, skip the following steps. The unit is now ready to run in
Track mode.
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2) If Auto-Zero is needed, then
a) Toggle the OFF/AZ switch to AZ to start Auto-Zero.
b) When Auto-Zero is done, only the 2 yellow LEDs at 0.0V are lit.
3) Set the OFF/PRB switch to PRB. The unit is now ready to run in Track mode.
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ZT-4 User’s Manual – Appendix
Appendix
A)
B)
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Sensor Installation (Doc# 11080)
Calibration Sheets (2) (Form# 1224)
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INSTALLING T400 LOAD SENSORS
The above illustrations represent the proper arrangement of Model T400 Load Sensor kit
parts using either the Drill and Tap method or the Weld method.
A proper installation is necessary to produce good results.
Before installing the sensors, please read the appropriate instructions listed below.
Sensor Placement
Press Frame
Pitman Mount
Drill and Tap Method of Installing Sensors
Weld Method of Installing Sensors
T400 Enclosure Mounting Details
Doc #: 11080
Rev :A
T400 INSTALLATION
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Page 4
Page 5
Page 6
Page 7
PAGE 1
Doc #: 11080
Rev :A
T400 INSTALLATION
PAGE 2
Doc #: 11080
Rev :A
T400 INSTALLATION
PAGE 3
Doc #: 11080
Rev :A
T400 INSTALLATION
PAGE 4
USING THE T400 SENSOR
INSTALLATION FIXTURE KIT No. 1977-749
(METRIC INSTALLATION FIXTURE KIT No. 1974-749)
DRILL AND TAP METHOD FOR MOUNTING SENSORS
BE SURE THE SENSOR LOCATION FOLLOWS THE BEST
LOCATION DESCRIBED ON THE PREVIOUS PAGES.
STEP 1 Remove all paint and grease from sensor mount area. If the
machine surface is flat (total indicated reading of .002”) and smooth
(125 µ in.) the load sensor can be bolted directly to the surface.
STEP 2 Drill and tap the center hole for mounting the fixture to the press
member. This hole should be ½ inch (13mm) deep.
STEP 3 Bolt the fixture to the press member using the ¼-28 by 1-¼ inch
(M6-1 x 35) long socket head cap screw in the center of the fixture.
STEP 4 Insert the number 3 drill (5mm) into the smaller corner hole and
drill out all four holes to a depth of ¾ of an inch (19mm.)
STEP 5 Loosen the fixture. Rotate the fixture 90 degrees clockwise.
Tighten the center screw of the fixture. Insert the number 21 drill
into the small centered hole and drill out both holes to a depth of
3/8 of an inch. These holes are for mounting the sensor enclosure.
The fixture does not allow for tapping these holes. They are
tapped without the fixture. Enclosure mounting is not done in
metric.
STEP 6 Loosen the fixture. Rotate the fixture another 90 degrees
clockwise such that the larger corner holes line up with the holes
drilled in Step 4. Insert a tap to be sure the holes line up. Lock
the fixture in place by tightening the center screw.
STEP 7 Insert the tap into the larger tap guide holes and tap each hole.
BE SURE TO USE PLENTY OF TAPPING FLUID.
STEP 8 Remove the fixture and repeat Steps 1-7 for each additional
sensor mounting position.
STEP 9 Mount the sensor with the raised rib to the press. The anti-torque
washers should go between the screw and the sensor body.
Torque each ¼-28 x ¾ in. long socket head cap screw to
150 LB.-IN or 12.5 LB.-FT.
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T400 INSTALLATION
PAGE 5
USING THE T400 SENSOR
INSTALLATION FIXTURE KIT No. 1977-749
WELD PAD METHOD FOR MOUNTING SENSORS
BE SURE THE SENSOR LOCATION FOLLOWS THE BEST
LOCATION DESCRIBED ON THE PREVIOUS PAGES.
STEP 1 Remove all paint, grease, and or rust from surface to be welded.
(Surface should be flat T.I.R. 1/32 of an inch.)
STEP 2 Drill and tap the center hole for mounting the fixture to the press
member. This hole should be ½ inch deep. (Optional)
STEP 3 Bolt the fixture to the press member using the ¼-28 by 1-¼ inch
long socket head cap screw in the center of the fixture. Orient
the fixture as shown and drill out the #21 holes to a depth of 3/8
of an inch for the enclosure mounting. The fixture is not used
for tapping these holes. (Optional)
STEP 4 Remove the fixture from the press member. Bolt the weld pads
to the fixture with ¼-28 by 1 inch long socket head cap screws
provided. Reattach the fixture with the weld pads bolted on
using the center hole as in Step 3. Orient the fixture as shown.
STEP 5 Weld the weld pads to the press member. (BE SURE TO
ONLY WELD THE WELD PADS ON THREE SIDES AS
SHOWN.) A single pass is sufficient. Do not remove the
fixture until slag is removed and or assembly has cooled. When
welding cast iron, use a dry nickel rod such as: Lincoln Electric
“Soft Weld”, Hobart “NI Cast 99”, or MB Weld Prod. “MG
210. Strike arc on steel then puddle into the cast iron.
STEP 6 Remove the weld fixture. DO NOT WELD AFTER FIXTURE
IS REMOVED. The 4 screws holding the pads to the fixture and
the 1 center screw may be discarded. DO NOT USE THE
FOUR 1 INCH LONG SCREWS TO ASSEMBLE SENSOR.
The sensor kit contains four ¾ inch long screws for assembling
the sensor to the press member. Weld pad surface must be clean
– no weld bumps, scratches, etc. Be sure the weld pad tapped
holes are clean and bottom of holes are free of weld flash.
STEP 7 Mount the sensor with the raised rib to the press. The antitorque washers should go between the screw and the sensor
body. Torque each ¼-28 x ¾ in. long socket head screw to 150
LB.-IN or 12.5 LB.-FT.
Doc #: 11080
Rev :A
T400 INSTALLATION
PAGE 6
Doc #: 11080
Rev :A
T400 INSTALLATION
PAGE 7